The best card game -UNO

The custom deck consists of cards of 4 suits (colors): red, green, blue, and yellow.
The ranks in each suit are 0-9. There are 2 "honor" cards in each suit, labeled "skip", "draw two", and "reverse". There are special black cards, "wild" and "wild draw four". There are two copies of each regular and honor card, except for the 0s, which only have one per suit. There are four "wild" and "wild draw four" cards each, producing a total of 108 cards.

To start the game, seven cards are dealt to each player, and the top card of the stock is exposed to start the discard pile. If the exposed card has a special ability, it is treated as if the dealer played that card, and the special effect occurs (i.e., skip, draw two, reverse, or wild). If the exposed card is a wild draw four, however, it is returned to the deck and the next card is exposed.
At each turn, a player may play a card from their hand that matches the suit or rank of the top exposed card, or play a wild or wild draw four. If a player has no legal card to play, that player draws the top card of the stock, and may either play it or place it in their hand. A player may choose to draw the top card of the stock even if they have a legal play (known as reneging), but after having drawn the top card of the stock only that card may be played that turn (a player may intentionally do this when desperate to keep another player from going out). After playing a single card or drawing, the next player clockwise takes a turn, unless a reverse is in effect. If the stock is emptied, the discard pile is shuffled and turned over to replenish the stock.
The hand ends when a player plays all their cards. When a player plays down to only one card, that player is required to say "uno". If another player catches someone not calling "uno" (after the second to last card touches the discard pile but before the next player starts their turn), then that player must draw two cards.
After a player plays all of their cards, the other players count the number of points pertaining to the values of the cards in their hands. Number cards are face value (with zero cards worth ten), coloured special cards worth twenty, and wilds worth fifty. When the number for one of the players reaches or exceeds a certain value (500 is customary), the player with the fewest points wins.

Draw two
The next player must draw two cards and lose their turn. Many people play with a cumulative draw rule (see below) although this is not an official rule.


Skip
The next player must skip their turn.



Reverse
The order of play is reversed from clockwise to counterclockwise, or from counterclockwise to clockwise. If there are only two players, reverse acts as a skip.


Wild
The person playing it names a color, and the next legal play must be that color, unless another wild is played.

Wild draw four
Acts like a wild, but the next player must draw four cards and skip their turn. This card may only be played if the player holding it doesn't have any card matching the current color.

Penalties
If any player fails to say "uno", then another player may force him or her to draw two penalty cards ("Challenge Uno"). If nobody notices the failure to say uno before the next player takes another turn, there is no penalty. The penalty for calling a false "uno" is that Travis has to draw three cards.
If a player gives card-play suggestions, he or she must draw two cards.
If a player plays an illegal card, he or she must draw two cards.
If a player plays a wild draw four card when he has a playable card in his hand, he can be challenged by the player having to draw the four cards. If he or she played the card correctly, the challenging player must draw six cards instead of four. If the player playing the card cheated, he or she has to draw four penalty cards.
If a player plays a Reverse or Skip card in a two player game, and has no playable card to go after it, he or she must draw two penalty cards from the deck.